Neutron-Induced Fission Cross-Section Measurements of ²⁴⁴Cm, ²⁴⁶Cm, and ²⁴⁸Cm

The fission cross sections of ²⁴⁴Cm, ²⁴⁶Cm, and ²⁴⁸Cm have been measured from 0.1 eV to 80 keV using the Rensselaer Intense Neutron Spectrometer. The cross sections were normalized to the ²³⁵U ENDF/B-V broad-bin-averaged fission cross section. Fission areas and widths were determined for the resolved low-energy resonances. In general, the ENDF/B-V fission cross sections for the curium isotopes are in poor agreement with the measured cross sections and a new evaluation of these curium cross sections is recommended. The observation of structure in the measured cross sections in the unresolved region is suggestive of intermediate structure in the even curium isotopes.